Author(s): Phan Nhu Nguyet; Do Thi Thuy Quyen; R. Brittany Merola; Avner Vengosh; To Thi Hien
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Keywords: Groundwater; Well water; Fluoride; Binh Dinh; Vietnam
Abstract: Groundwater is a significant source of water in Binh Dinh province, Vietnam where inhabitants are reliant on groundwater as their primary supply of domestic and potable water. This need is mainly being satisfied by pumping groundwater from aquifer systems. However, groundwater quality patterns are complex because of its effects on dental health. Besides, groundwater quality is poorly managed and monitored. The objective of this study is to evaluate groundwater quality in Tay Son district, Binh Dinh Province with special emphasis on the risk of fluoride pollution in groundwater. A total of 42 well-water samples were collected during 2011 and 2012 and analyzed for physic-chemical parameters: Ca 2+, Mg 2+, Sr 2+, Na +, Fe 2+, Ba 2+, Mn 2+, Al 3+, K +, As 3+, F -, ClF -, BrF -, SOF 4 F 2-, HCOF 3-, NOF 3- etc., and of the physical parameters: pH, Eh, Electrical Conductivity, Dissolved Oxygen and the temperature. The groundwater is classified as CaSOF 4 type water which is typical of gypsum groundwaters and mine drainage groundwater. Fluoride concentrations in groundwater in study area ranged from 0.06 to 8.31 mg/L with 52%of well-water samples above the maximum permissible limit of 1.5 mg/L of World Health Organization (WHO) drinking water standard. The high fluoride concentration in groundwater is the evidence of dental fluorosis in study area. It is recommended that water with high fluoride concentration and heavy metal should be removed to protect communities from dental fluorosis.
Year: 2014